body {
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: #333;
}


html {
    scroll-behavior: smooth;
}


@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { transform: translateX(-30px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}


.banner, .sustainability-intro, .sald, .member-card, .project-card {
    animation: fadeIn 0.8s ease-out forwards;
}

.list-message li {
    animation: slideIn 0.5s ease-out forwards;
    opacity: 0;
}

.list-message li:nth-child(1) { animation-delay: 0.1s; }
.list-message li:nth-child(2) { animation-delay: 0.2s; }
.list-message li:nth-child(3) { animation-delay: 0.3s; }
.list-message li:nth-child(4) { animation-delay: 0.4s; }
.list-message li:nth-child(5) { animation-delay: 0.5s; }


header {
    display: flex;
    width: 100%;
    align-content: center;
    justify-content: center;
    position: fixed;
    top: 0;
    z-index: 1000;
}

.top {
    background-color: rgba(255, 255, 255, 0.95);
    width: 100%;
    display: flex;
    flex-direction: row;
    justify-content: start;
    align-items: center;
    padding: 0 30px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    backdrop-filter: blur(10px);
}

.top img {
    height: 45px;
    overflow: hidden;
    padding: 5px;
    margin-right: auto;
    transition: transform 0.3s ease;
}

.top img:hover {
    transform: scale(1.1) rotate(5deg);
}

.top button {
    padding: 14px 24px;
    color: #333;
    background-color: transparent;
    border: none;
    cursor: pointer;
    font-size: 16px;
    font-weight: 500;
    transition: all 0.3s ease;
    position: relative;
    margin: 0 5px;
}

.top button:hover {
    color: #007bff;
    background-color: transparent;
}

.top button::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 2px;
    background-color: #007bff;
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.top button:hover::after {
    width: 80%;
}

.top form {
    display: flex;
    align-items: center;
    margin-left: auto;
    background-color: #f5f5f5;
    border-radius: 25px;
    padding: 5px;
    transition: all 0.3s ease;
}

.top form:focus-within {
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.25);
    background-color: white;
}

.top input[type="text"] {
    padding: 10px 18px;
    border: none;
    background: transparent;
    border-radius: 25px;
    width: 220px;
    font-size: 15px;
}

.top input[type="text"]:focus {
    outline: none;
}

.top input[type="submit"] {
    padding: 10px 18px;
    background-color: #007bff;
    color: white;
    border: none;
    border-radius: 25px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 15px;
}

.top input[type="submit"]:hover {
    background-color: #0056b3;
    transform: translateY(-2px);
}


.banner {
    width: 100%;
    height: 100vh;
    background-image: url('../img/top-img.jpg');
    background-size: cover;
    background-position: center;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 60px;
    position: relative;
}

.banner::before {
    display: block;
    position: absolute;
    content: '';
    width: 100vw;
    height: 100%;
    padding: 10px;
    background-color: rgba(0, 0, 0, 0.3);
}

.banner p {
    font-size: 36px;
    font-weight: bold;
    color: white;
    padding: 20px;
    border-radius: 10px;
    z-index: 1;
    text-align: center;
    line-height: 1.6;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.5);
    max-width: 800px;
}

.message {
    padding: 60px 32px;
    display: flex;
    flex-direction: row;
    align-content: center;
    justify-content: center;
    gap: 40px;
}


.list-message {
    display: flex;
    flex-direction: column;
    align-content: start;
    justify-content: start;
    width: 450px;
    box-shadow: 1px 1px 15px rgba(0, 0, 0, 0.15);
    padding: 15px;
    font-size: 1.1em;
    margin: 0;
    border-radius: 10px;
    background-color: white;
}

.list-message h2 {
    margin-left: 15px;
    margin-bottom: 20px;
    color: #007bff;
    position: relative;
    padding-bottom: 10px;
}

.list-message h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 3px;
    background-color: #007bff;
}

li {
    display: flex;
    list-style-type: none;
    padding: 12px 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 8px;
    margin-bottom: 8px;
}

li:hover {
    box-shadow: 2px 2px 10px rgba(0, 0, 0, 0.2);
    background-color: #f8f9fa;
    transform: translateX(5px);
}

li .icon {
    transition: all 0.3s ease;
    margin-left: auto;
    margin-right: 5px;
    color: #007bff;
}

li:hover .icon {
    margin-right: 0;
    transform: translateX(5px);
}


.imgs {
    position: relative;
    width: 650px;
    height: 450px;
    overflow: hidden;
    margin-right: 20px;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.2);
}

.imgs ul {
    position: absolute;
    width: 500%;
    height: 100%;
    display: flex;
    transition: transform 0.5s ease;
    left: 0;
}

.imgs li {
    width: 20%;
    height: 100%;
    padding: 0;
    flex-shrink: 0;
}

.imgs img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.imgs button {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.6);
    color: white;
    border: none;
    padding: 15px 20px;
    cursor: pointer;
    z-index: 2;
    border-radius: 50%;
    transition: all 0.3s ease;
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.imgs button:hover {
    background: rgba(0, 0, 0, 0.8);
    transform: translateY(-50%) scale(1.1);
}

.imgs .prev {
    left: 10px;
}

.imgs .next {
    right: 10px;
}


.container {
    padding: 60px 32px;
    background-color: #f5f5f5;
}

.container h2 {
    text-align: center;
    color: #333;
    margin-bottom: 40px;
    font-size: 32px;
    position: relative;
    padding-bottom: 15px;
}

.container h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 3px;
    background-color: #007bff;
}

.sustainability-intro {
    max-width: 1100px;
    margin: 0 auto 60px;
    padding: 40px;
    background-color: #f8f9fa;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
}

.sustainability-intro h3 {
    color: #28a745;
    font-size: 28px;
    margin-bottom: 25px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.sustainability-intro h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 3px;
    background-color: #28a745;
}

.sustainability-intro p {
    color: #555;
    line-height: 1.8;
    margin-bottom: 20px;
    font-size: 17px;
}


.sald {
    max-width: 1200px;
    margin: 0 auto;
    background: white;
    border-radius: 15px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.1);
    padding: 40px;
    display: flex;
    gap: 50px;
}

.sald img {
    width: 550px;
    height: auto;
    object-fit: contain;
    border-radius: 0;
    transition: transform 0.5s ease;
}

.sald img:hover {
    transform: scale(1.05) rotate(2deg);
}

.sald form {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.sald h3 {
    color: #333;
    font-size: 26px;
    margin-bottom: 15px;
    position: relative;
    padding-bottom: 10px;
}

.sald h3::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 60px;
    height: 3px;
    background-color: #007bff;
}

.sald select {
    padding: 14px;
    border: 1px solid #ddd;
    border-radius: 10px;
    font-size: 16px;
    background-color: white;
    cursor: pointer;
    transition: all 0.3s ease;
}

.sald select:hover {
    border-color: #007bff;
    box-shadow: 0 0 0 2px rgba(0, 123, 255, 0.1);
}

.sald select:focus {
    outline: none;
    border-color: #007bff;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}

.sald .button-group {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.sald button {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 15px;
    transition: all 0.3s ease;
}

.sald button.tech-btn {
    background-color: #f8f9fa;
    color: #333;
    border: 1px solid #ddd;
}

.sald button.tech-btn:hover {
    background-color: #e9ecef;
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.sald button.tech-btn.active {
    background-color: #007bff;
    color: white;
    border-color: #007bff;
    animation: pulse 1.5s infinite;
}

.sald input[type="submit"] {
    background-color: #28a745;
    color: white;
    padding: 14px 28px;
    border: none;
    border-radius: 8px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 20px;
    font-weight: 500;
}

.sald input[type="submit"]:hover {
    background-color: #218838;
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(40, 167, 69, 0.3);
}

.sald .price {
    margin-top: 25px;
    padding: 18px;
    background-color: #f8f9fa;
    border-radius: 10px;
    text-align: center;
    font-size: 22px;
    color: #dc3545;
    font-weight: bold;
    transition: all 0.3s ease;
}

.sald .price:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(220, 53, 69, 0.2);
}

.sald .price::before {
    content: "价格：";
    color: #666;
    font-weight: normal;
}


.memeber {
    padding: 60px 32px;
    display: flex;
    justify-content: center;
}

.member-card {
    width: 320px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
}

.member-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.member-card img {
    width: 160px;
    height: 160px;
    border-radius: 50%;
    margin-bottom: 20px;
    transition: transform 0.5s ease;
    border: 5px solid #f8f9fa;
}

.member-card img:hover {
    transform: scale(1.1) rotate(5deg);
}

.member-card h3 {
    color: #333;
    margin-bottom: 15px;
    font-size: 22px;
}

.member-card p {
    color: #666;
    line-height: 1.8;
    margin-bottom: 10px;
    font-size: 15px;
}

.member-card .social-links {
    margin-top: 20px;
    display: flex;
    justify-content: center;
    gap: 15px;
}

.member-card .social-links a {
    color: #666;
    font-size: 20px;
    transition: all 0.3s ease;
}

.member-card .social-links a:hover {
    color: #007bff;
    transform: translateY(-5px);
}


.works {
    padding: 60px 32px;
    display: flex;
    flex-wrap: wrap;
    gap: 30px;
    justify-content: center;
}

.project-card {
    width: 320px;
    background: white;
    border-radius: 15px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    transition: all 0.4s ease;
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 15px 30px rgba(0, 0, 0, 0.15);
}

.project-card img {
    width: 100%;
    height: auto;
    object-fit: contain;
    transition: transform 0.5s ease;
}

.project-card:hover img {
    transform: scale(1.08);
}

.project-card-content {
    padding: 20px;
}

.project-card h3 {
    color: #333;
    margin-bottom: 12px;
    font-size: 18px;
}

.project-card p {
    color: #666;
    font-size: 15px;
    line-height: 1.6;
}

footer {
    background-color: #333;
    color: white;
    text-align: center;
    padding: 60px 0 30px;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    padding: 0 30px;
}

.footer-info, .footer-links, .footer-copyright {
    flex: 1;
    min-width: 250px;
    margin-bottom: 30px;
    text-align: left;
}

.footer-info p, .footer-copyright p {
    margin: 10px 0;
    font-size: 15px;
    line-height: 1.6;
}

.footer-links {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 10px 0;
    transition: all 0.3s ease;
    position: relative;
}

.footer-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background-color: #007bff;
    transition: width 0.3s ease;
}

.footer-links a:hover {
    color: #007bff;
    transform: translateX(5px);
}

.footer-links a:hover::after {
    width: 100%;
}

.footer-copyright {
    text-align: right;
}

.footer-copyright p:first-child {
    font-weight: bold;
    font-size: 16px;
}

@media (max-width: 1200px) {
    .sald {
        flex-direction: column;
        padding: 30px;
    }
    
    .sald img {
        width: 100%;
        max-width: 550px;
        margin: 0 auto;
    }
    
    .imgs {
        width: 100%;
        max-width: 650px;
        height: 400px;
    }
}

@media (max-width: 768px) {
    .message {
        flex-direction: column;
        align-items: center;
    }
    
    .imgs {
        margin-right: 0;
        margin-bottom: 30px;
    }
    
    .list-message {
        width: 100%;
        max-width: 450px;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-info, .footer-links, .footer-copyright {
        text-align: center;
        margin-bottom: 30px;
    }
    
    .footer-copyright {
        text-align: center;
    }
}